How to perform urlencode

Netduino Development
1

Looking for a method to encode a URL but cannot find one. Can some point me in the right direction (NETMF 4.3).
Thanks

2

I think that you will have to write your own (or find an implementation on the web). I have seen questions of this nature in the past and the developer has always provided their own implementation of this method.

Regards,
Mark

3

Thanks Mark, that is what I ended up doing.

How do I insert a code snippet into the blog? Will supply the code I wrote in case its of help to anyone else.

Thanks
Joe

4

Thank you being willing to share your work.

This site allows the use of markdown to format messages. Git has a Markdown guide which covers the basics. Scroll down the page and look for the Syntax Highlighting section. The language tag for C# is the three back ticks followed by the word csharp. Note that this is in lower case. Code should look like the following when formatted correctly.

int i = 0;

Regards,
Mark

5

Thanks again Mark

In case anyone is interested here is the routine I wrote for the URL encoding. It does not cater for all the possible characters that need escaping but handled the ones I needed.

Note: Space can be replaced by either %20 or the + sign depending on whether its Url or Uri encoding. I have opted for + sign as I need to match what the TextEncoder.Encode() does in .Net Core 2.0.

        /// <summary>
        /// Simple URL encoder that replaces characters from URL and replaces with percentage escaped chars
        /// </summary>
        /// <param name="_input">Url to encode</param>
        /// <returns>Encoded Url</returns>
        public static string SimpleUrlEncode(string _input)
        {
            StringBuilder _encoded = new StringBuilder();
            foreach( char _chr in _input)
            {
                switch(_chr)
                {
                    case ' ':
                        //_encoded.Append("%20");
                        _encoded.Append("+"); // Trying to match the output of the .Net Core TextEncoder.Encode()
                        break;
                    case '!':
                        _encoded.Append("%21");
                        break;
                    case '"':
                        _encoded.Append("%22");
                        break;
                    case '#':
                        _encoded.Append("%23");
                        break;
                    case '$':
                        _encoded.Append("%24");
                        break;
                    case '%':
                        _encoded.Append("%25");
                        break;
                    case '&':
                        _encoded.Append("%26");
                        break;
                    case '-':
                        _encoded.Append("%2D");
                        break;
                    case '/':
                        _encoded.Append("%2F");
                        break;
                    case ':':
                        _encoded.Append("%3A");
                        break;
                    default:
                        _encoded.Append(_chr);
                        break;
                }
            }
            return _encoded.ToString();
        }
1 Like
6

Thank you for sharing,
Mark